CVE-2025-9809: Out-of-bounds write in cdfs_open_cue_track in libretro libretro-common latest on all platforms allows remote a

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CRITICAL 9.8REMOTEMITIGATE

CVE-2025-9809 is a critical-severity flaw (CVSS 9.8) affecting libretro-common. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Out-of-bounds write in cdfs_open_cue_track in libretro libretro-common latest on all platforms allows remote attackers to execute arbitrary code via a crafted .cue file with a file path exceeding PATH_MAX_LENGTH that is copied using memcpy into a fixed-size buffer.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-787
Published	2025-09-01
Last modified	2026-06-17

Publisher (CNA): CyberArk Labs · Vendor: libretro

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-01 19:15 UTCPublished CVE record published
2026-06-17 10:09 UTCUpdated Record last modified

libretro libretro-common MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libretro-common || rpm -q libretro-common || libretro-common --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-9809?

libretro-common: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-9809 being exploited?

CVE-2025-9809 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-9809 affect?

CVE-2025-9809 affects libretro-common. Severity is critical (CVSS 9.8). Out-of-bounds write in cdfs_open_cue_track in libretro libretro-common latest on all platforms allows remote attackers to execute arbitrary code via a crafted .cue file with a file path exceeding PATH_MAX_LENGTH that is copied using memcpy

How urgent is CVE-2025-9809?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

References

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